Stove and furnace



J. B. GOHMANN.

STOVE AND FURNACE- APPLICATION FILED APR. 20, 1921.

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Patented July 111, 1922.

l. B. GOHMANN.

STOVE AND FURNACE.

APPLICATION FILED.APR.20, 1921.

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STOVE AND FURNACE.

Application filed April 20, 1921.

To all whom it may concern:

Be it known that 1, JOHN B. GOHMANN, a citizen of the United States, residing at Lincoln, in the county of Lancaster and State of Nebraska, have invented certain new and useful Improvements in Stoves and Furnaces, of which the following is a speci fication.

My invention relates to flue construction of stoves or furnaces, and the relation of such construction to the other parts of the stove or furnace. Its object is to provide for adequately long travel of the combustion products prior to passage to the atmosphere, so as to obtain a sufficiently large proportion of the heat therefrom; and to provide for this by means of a simple practicable construction so disposed relatively to the other parts of the stove or furnace as to not involve any objectionable design thereof or interfere with the construction or operation of desirable details in such other parts of the stove or furnace. v

My invention consists in the combination of parts and in the details of construction and arrangement of parts as will hereinafter be more fully described and claimed.

In the drawings:

Fig. 1 is a general perspective view of a furnace with the outer casing indicated by dotted lines only, to illustrate my improved flue construction, and withparts of the flue represented as broken away to show the interior formation thereof;

Fig. 2 is a horizontal section on the line 22 of Fig. 5;

Fig. 3 is a sectionalperspectiveview showing the damper construction;

Fig. 4 is a perspectivev view similar to Fig. 1, but taken from the rear of the structure and with part of the base shown as broken away for lack of space;

F 5 is a vertical longitudinal section on the Liane corresponding to the line 55 of Fig. 2.

Fi 6 is a sectional view corresponding to Fig. 2, but showing a modification; and

Fig. 7 is a vertical longitudinal section on a plane corresponding to the line 77 of Fi i I prefer to construct my invention, the main part of the furnace is made up of the casting 1 resting on top of the fire-pot 2 and having a clean-out opening 3 out through the front 1 of the furnace which Specification of Letters Patent.

Patented July 11, 1922.

Serial No. 482,953.

is closed by a door 5; and supporting the magazineo which feeds the fuel down onto the grate 7 at the bottom of the fire-pot 2 and over the ash-pit 8 upon which the fire-pot 2 is supported, and which has the clean-out and draft opening 9 through the front #1 closed by the door 10 and provided with a suitable draft-door or damper 11.

The foregoing details are not original in the present invention and are shown and mentioned merely to elucidate the succeeding description and claims, as an example of a combustion chamber.

The casting 1, has, leading from its rear side near its bottom, the flue outlet 12 flanged at its rear end. The distributing head 13 has its flanged front end bolted to the flanged rear end of the outlet 12 and has branches 14 extending to the right and left, respectively, around the casting 1 toward the front of the furnace and terminating at the sides of-the casting 1 in forwardly extending flanged end parts 15. Preferably, this head 13 with its branches 14: is made up of upper and lower sections 13 and 13", respectively, having flanges that meet in a horizontal plane and are bolted together. The top of the distributing head 13 has, above the branches 1 1, the outlet opening 16 to which is connected the elbow 17 which in thewell known manner leads to the pipe for carrying the products of combustion out to the atmosphere. The lower side of the head 13 has under its upper outlet 16, the inlet 18, which forms a lower connection which will presently be described.

The flue 19 at each side of the furnace comprises the upper short part 20 with flanged rear end connected to the flanged front end 15 of the respective branch 14; the

backwardly leading part 21 just below the part 20 and communicating with said part 20. forwardly through the U-shaped bend 22; the forwardly leading part 23 just below the part 21' and communicating with said part 21 rearwardly through the U-shaped bend 24; and the short end part 25 below the forwar dly leading part 23 and communicating with said part 23 through the U-shaped bend 26 similar to the bend 22.

The U-shaped bends 22 and 26 have open flanged front ends 22 and 26, respectively, which are bolted to therear sides of the furnace front 4 and register with openings through said front which are normally closed by plates or doors 27. 7, 7

Preferably, each of the flues 19 is made up of inner and outer sections 19 and 19", respectively, with flanges meeting in a vertical plane and bolted together at the sides.

The collecting head 28 lies substantially Vertically below the lower inlet 18 of the distributing head 13, previously mentioned, and has lateral branches 29 curving forwardly around the ash-pit 8 with flanged front end parts 30 connected to the flanged lower end parts 25 of the respective flues 19. This collecting head 28 with its branches 29 is preferably made, like the distributing head 13, in upper and lower sections 28 and 28, respectively, with flanges meeting in a horizontal plane and bolted together at the sides. The top ofthe collecting head 28 has the flanged outlet 31.

The vertical pipe 32 has a flanged lower end fitting the outlet 31 and has a flanged upper end fitting the lower inlet-18 of the distributing head 13, previously mentioned. Preferably, this vertical pipe 32 is made in front and rear sections 32 and 32" with flanges meeting in a vertical plane and bolted together at the sides.

A binding rod 33 preferably runs from the rear parts of the flanges of the upper distributing head 13 down to the rear parts of the flanges of the lower collecting head 28, thereby binding these parts together against the vertical part 32; and preferably this rod has a helical spring 34 around it below the flange of the head 28 between the flange and.

the lower head 33 of the rod to compensate for variable contraction and expansion of the parts.

A baflie 35 has sides 36 and a front 37 around the outlet opening 16, but spaced the interior of the furnace out through the outlet 16. When the fire is being started in the furnace, or at any other time when a strong directdraft is required, the damper 39 may be opened, as indicated in Fig. 3; but

when it is closed, as shown in Fig. 2, the

combustion products are compelled to travel from the distributing head 13 laterally where the baffle sides 36 are spaced away from the entrances to the branches 14 in both directions around through these branches 14, forwardly through the upper lecting head 28, whence they travel upwardly through the upright pipe 32 and through the inlet 18 to the inside of the baflle 35, and out therefrom through the outlet 16 and elbow 17. i I 1 V In the modification shown'in Figs.'6 and 7, the distributing head 13 has the upper outlet 16 and lower inlet 18' to the rear of the branches 14; and the side flues 19 are longer in proportion in their lower parts 20, 23. The collecting head 22 also has its branches 29 longer, so that its outlet'3l comes under the distributing head inlet 18* and is connected thereto by the upright pipe 32 as in the preceding example. 'The baffle 35 is thus dispensed with, and the damper 39 is hinged directly to the inside of the distributing head 13 just to the rear of the branches14 and worked by the arm 40 and rod 41 as in the other example. WVhen the damper 39 is closed as shown, thedraft is out through the branches 14 and through the system of flues; but if the damper 39 is opened, the draft is directly out through the elbow 17.

'Themain middle part of the distribut ing head 13 may be readily cleaned by access through the clean-out 3 of the casting 1, when the door 5 is open. parts of the fines 19 and their adjoining branches 14 and 29 are readily cleaned by access when the doors or plates 27 are removed or opened.

It will be seen that a very considerable flue-length is afforded within a compara- The various 7 tively small space, and with the heating 7 surfaces thus afforded rather evenly distributed throughout this space around the main part of the furnace; and yet this main part of the furnace is permitted to be of approved construction without the necessity of altering or dislocating any of its important details for passage from front to rear of any of the flues; ,Moreover, notwithstanding the great extent of the fines, practically their entire lengths are readily. accessible for cleaning by'the simple opening of the front of the furnace. In addition to this, where,the parts are designed according to the examples given herein as preferable,fthe manufacture of the parts and their assemblage is greatly facilitated; permitting all of'the parts to be made of heavy and substantial material such as cast iron, and to have ample joints which may be readily rendered proof against the escape of the combustion gases into the inside of the casing 44 where the 'air is being heated;

or, where no casing is used, out into the space around the furnace or stove to pollute the air of the room or otherplace being heated thereby.

However, while certain constructional details are deemed preferable in connection with my invention, and I have shown and described theserather specifically in elucidating the construction and use of my invention, as is required, I do not wish to be understood as being limited to such precise showing and description, except as claimed hereinafter.

I claim:

1. In a stove or furnace, in combination with a combustion chamber having a rear smoke outlet at the top, a smoke receiving and distributing head having an inlet connection intermediate its ends with said outlet, and provided with end branches extending forwardly along opposite sides of the combustion chamber, said head also having a smoke outlet, a smoke collecting head behind the combustion chamber and having end branches extending forwardly along opposite sides of the combustion chamber, said collecting head and its branches being located below the first-mentioned head and its branches, a pipe extending vertically between said heads and establishing a connection therebetween intermediate their ends, a series of connected fiues located adjacent to each side of the combustion chamber, the series of fines on one side being connected to and establishing communication between one of the forward ends of the branches of the aforesaid heads, and the series of fines on the other side being connected to and establishing communication between the forward ends of the other branches of the heads, and means for establishing a direct connection between the smoke outlet of the combustion chamber and the smoke outlet of the first-mentioned head, said means being adjustable to break said direct connection.

2. In a stove or furnace, in combination with a combustion chamber having a rear smoke outlet at the top, a smoke receiving and distributing head having an inlet connection intermediate its ends with said outlet, and provided with end branches extending forwardly along opposite sides of the combustion chamber, said head also having a smoke outlet, a smoke collecting head behind the combustion chamber and having end branches extending forwardly along opposite sides of the combustion chamber, said collecting head and its branches being located below the first-mentioned head and its branches, a pipe extending vertically between said heads and establishing a connection therebetween intermediate their ends, and a series of connected fines located adjacent to each side of the combustion chamber, the series of fines on one side being connected to and establishing communication between one of the forward ends of the branches of the aforesaid heads, and the series of flues on the other side being connected to and establishing communication between the forward ends of the other branches of the heads, the members of each of the aforesaid series of fines being horizontally positioned and vertically spaced, and having their front and rear ends connected by elbows, the front elbows having clean-out openings, and closures for said openings.

In testimony whereof I aflix my signature.

JOHN B. GOHMANN. 

